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Hi there! Have questions about your homework? At Brainly, there are 60 million students who want to help each other learn. Questions are usually answered in less than 10 minutes. Try it for yourself by posting a question! :D

The perimeter of a parallelogram is 2(l=b). the opposite sides are equal in length.so, this information can be put in an equation as-2(7x+3x)=100now, we will open the brackets.14x+6x=10020x=100now, we will leave x to one side and shift 20 to rhsx=100/20 which implies x=5

now it is very easy to find the sides of the parallelogram, as we now know the value of x.the sides are 7x and 3x7*5 and 3*5which is equal to 35 and 15.DONE!!!!!!!!!!!!!!!!!